package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        if (categoryId == null) {
            return Result.error("分类id不能为空");
        }

        String key = "dish_" + categoryId;

        try {
            // 查询redis缓存
            Object value = redisTemplate.opsForValue().get(key);
            if (value != null) {
                List<DishVO> list = (List<DishVO>) value;
                if (!list.isEmpty()) {
                    return Result.success(list);
                }
            }

            // 查询数据库
            log.info("redis中无数据，查询数据库");
            Dish dish = new Dish();
            dish.setCategoryId(categoryId);
            dish.setStatus(StatusConstant.ENABLE);

            List<DishVO> list = dishService.listWithFlavor(dish);

            // 将数据库查询结果缓存到redis
            redisTemplate.opsForValue().set(key, list);

            return Result.success(list);
        } catch (Exception e) {
            log.error("查询菜品异常：{}", e.getMessage());
            return Result.error("查询菜品失败");
        }
    }
}